Q: What is the sum of all factors of the number 28,172 excluding 28,172?

 A: 21,136

Why is 21,136 the sum of all factors of 28,172, excluding 28,172?

The factors of the number 28,172 are: 1, 2, 4, 7043, 14086, 28172.

If you add them up, you will get the total of 28,193. Now subtract 28,172 to get 21,136


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